server to server auth not working

Hello

I am wating to add some things to my server to server to whitelist. However, The mobile phone number authentication is refusing to send me a message so I cannot get the verification code.

Who do I speak to about this for site https://techbuisness.altervista.org/

Hello, could you please provide the phone number you used? (you can omit the last 3 digits). If you want, you can also send it to me in private.

Bye!